Combined throttle and emergency valve.



vv. JUHNSON.

COMBINED THROTTLE AND EMERGENCY VALVE.

' APPLICATION FILED JAN. 22, 1912.

1,041,478, Patented 001:. 15, 1912.

4 SHEETSSHEBT l.

' v Im/enhor; Werner" W. JOHNSON.

COMBINED THROTTLE AND EMERGENCY VAL'VE.

APPLICATION FILED JAN.22.1912.

1,041,478. Patented Oct. 15, 1912 4 SHEETS-SHEET 2v I Inventor;

Werner Joh nsom W. JOHNSON.

COMBINED THROTTLE AND EMERGENCY VALVE.

APPLICATION FILED JAN. 22,1912.

Patented Oct. 15, 1912.

4 SHBETSSHEET s.

Witnesses;

, l .l lau h I W. JOHNSON.

COMBINED THROTTLE AND EMERGENCY VALVE.

APPLICATION FILED JAN.22,1912. 1,041,478: Patented Oct. 15, 1912.

4 SHEBTSSHBBT 4.

view otthe valve actuatin COMBINED THROTTLE AND EMERGENCY .VALVE .raitiieaa sortie T 's Ar WERNER JOHNS01\T; OF LYNN, MASSACHUSETTS;nssxenon TO COMPANY, A CORPORATION on NEW YORK.

Specification of Letters Patent.

X ut

GENERAL Emmet a Manama.iamie;

Application filed January 22, 1912. Serial No. 672,614. v

To all whom it may concern:

Be it known that I, VVERNER JOHNSON, a citizen of the United States,residing at Lynn, county of Essex, State of Massachu- 5 sett-s, haveinvented certain new and useful Improvements in- Combined Throttle andEmergency v alves of which the following is a specification... I

The present invention relatesfito valves which are employed to controlthe admission of steam or movers.

M0 re specifically the invention relates to-a valve that can be openedand closed y a hand wheelin the'ordinary manner and Which from any oneor" its positions other elastic fiuidto prime can be closed suddenly, asfor example by a speed governor driven by the prime mover receivingmotive fluid through said valve.

The invention has for its'object to improve the construction ofsuchvalveswhere by they are rendered more certain and reliable in theiraction, the parts of the valve mechanism being of a simple, reliablecharacter, readily manufactured and not liable to get out of order. sFor a consideration of what I believe to be novel and myinvention,attention is directed to the accompanying description and the claimsappended thereto. In the accompanying drawings is illustrated one of theembodiments of 'my invention, Wherein- Figure 1 shows a valve mechanismwith a tripping In'canswhich is operated by a speed responsive device;Fig. 2 is an axial section showing the internal mechanism of the valve;

taken on line H ,of'Fig. 2; Fig. 5 is a and its actuating Fig. 3 is aplan' View of the valve with a portion ofit broken away; Fig. 4 isacross-section of the valvecrcss-section taken; on the line 5-5 of Fig.

5 2; Fig. 6 is a cross-section taken on the line 6-6 cf Fig. 2; Fig. 7is asection taken on the line 7-7 of Fig.

2; F ig. illustrates the positiqn, ofth'e vvalve actuating nut when thevalve is in closed position, saidvalve having been operated by hand;Fig. 9 is a the valve in closed ing been closed by crating mechanismFig. '11 is an isometric" I an isometric viewqoztrzthti rollers g nut;Fig. l2is a maits by means :of projections 11 trunnion member to whichtheyfare coii nected; Fig. 13 is a partial axialfsegition H takenthrough the nut and meant/sensing weight, said figure showingthe a'lve,inf closed position and the relation between'ithe weight and the nutwhen in 'tlja'tpo ititiiij, *ig. 14 is a similar view showing' the'valvev closing weight in the same position Fig. 13, but with the nut initsupp'ei positime, this actionbeing 'ac complished byr61 5 tating thehand wheel with the valve omits seat; and Fig. 15 is a view illustratingthe qresetting of the actuating nut and its I. leasing means. a

Referring to Fig. 1, A indicates a. portionjg of a turbine to whichsteam is adinittedibv the conduit B containing my ,impr'oved valve.G'indicates a governor shaft drivn by; the main turbine shaft throughsuitable pgearing. On the shaft is anv emergency governor comprising forexamplela coiled-5 spring D whose free i when the speed becomes toogreat and strikes the trigger E. This trigger normally holds. 0 thelatch F which in turn prevents the valve closing Weight from falling asWill-appearaater.

emergency closing of the valveis controlled by the trigger E and that itforms the ,prin;- cipal means for holding up the weight.: It is also tobe notedthat it has no connection: with the hand wheel so that the valvemay.. be suddenly and auton'iatically closed from any of its positionseven thoughthebopere 90 atorbe in the act of moving ithyhand.

vided with a partition 6. Fig. 2. Formedin. the, partition 6 is avalveseat .7, ;;S;ecnred to the valve casing 5 is a: split yoke S. which1 is adapted to receive the valve operating mechanism. The yoke ismadein a single" piece and is bored transversely to receive 1.

a trunnion carrying member, andalso longi-u neck tt e y "weighty e valve10 decl in its vertical moveis gui end moves outwardly .It is to benoted that automaticora- A it 5 indicates a valve casing which ispro- Atudinally forming a tubular end to"receive ,100

anotherormed on the main valve.

located at its top and bottom ends. Extendi struction in additionto-transmitting movei i the annular V groove ments of the spindle to,the valve serves as an auxiliary valve for admitting high pressure fluidto the under side of the main valve for the purpose of balancing itduring the opening operation. Without such an arrangement an excessiveamount of power might be required to operate it if there was a heavypressure on the upper side of the valve. When open the valve issubstantially balanced but has a slight tendency to close due to, theunbalanced area of the spindle and to the weight of the parts.-

The lower portion 20 of the valve 10 is annular in formation andcooperates with closing to-prevent it frompounding. This is due to thefact that steam is trapped in the spacebetween the parts 20 and 21. Bythe time the steammovementot the valve and prevents it from strikingSuch action is of"irn portance when'the valve is suddenly closed.

the valve casing.

v Machined on the spindle 15 is a threaded portion 26 which cooperateswith the longi: tudinally movable or sliding nut 27 Figs. 2 and 11..Cast.'with the nut 27 are rectangular projections 28, F igs. 6'and11,

which are located in the longitudinal slots 29 formed between the legsor parts of the yoke 8. These projections are for the purpose ofpreventing the nut 27 fromturning while permitting it to move axially. IBy this construction it is evident that thenut movement up or down hasonly alvertical As this nut plays an as the case may be.

important part in the operation of the valve,

. further de'scnption .thereof will be given hereinafter. e I Formed onthe cap 1710f the .valve spindle,

- Fig. 2, is a flan e 30 which acts against the shoulder 31 of.thevalVe-1O. Hence any;

upward movement of the spindle 15 will lift the valve due to this flangeand shoulder construction. Downward movement of the spindle 15 causesthe nut 18 to come in contact with the surface 32 of the main valve,

by forcing it to move downwardly.

bore in the yoke 8 1s a Mounted in a 35, Figs. 2 and 5, which 1everparts 21 when the valve is position 2 has escaped from the sleevesmember 20,the valve is "seated. In'oth'er' words these members have ada'shf'pot area which retards the downward Fig. The weight 49 then waterof condensation which accumulates in iscylindrical in cross-section andis held in positionby means of bolts 36, as shown in' Fig. 5. 'As beforestated, the yoke8 is split longitudinally. In other words it comprisestwo legs that are united at their upper ends. By placing the trunnionmember 35 as shown and clamping it by the bolts 36 the legs of the yokeare firmly held in 'position. By making the outer surface of said memberround the machine operations are simplified, and owing to its shape; itis securely anchored against axial movement.

Centrally drilled in the member 35 is'a hole through which the spindle1'5 and nut27 extend. Formed on opposite sides of the member arecylindrical projections or pivots 37 and 38 on which is fulcrumed alever comprising parts .39 and 4Q in position by means of nuts. Castwith the 39 an d l0 are hooks 41 and 12, Figs. 1, 2 and 9.- Connected tothe levers 39 and 10 is a pin' 45 held in position by means of nuts.Mounted on the pin 45 is an eye Q6,Figs. 1,. 2 andlO, which is threadedto the rod 3,- said eyebeing held in a central 17 Under normalconditions the levers 39, 40, hooks 41, 42 andassociatedparts are heldin position by meansof the latch F controlled by the trigger E, Fig. 1.

Underconditions'of excessive s eed the free on the pin 45 by means ofspacing whichare held end of the emergency governor moves outwardly dueto centrifugal .force therebv cansing the trigger E-to release the latchF. causes'the hooks 41 and around from under the anti- 12 "to swing I50' and 51 until-checked by friction rollers the stop .52, as shown inFig. 9. Cast withthe levers and hooksiare arms 53 and 54 which are soconstructed and arranged in ,relation to the hooks that the rollers intheir upward travel -(the resetting. operation) come in contact withsaid arms and cause the hooksto swing bank under the rollers. When thisis done, the tripping mechanism is reset and the valve members are heldin their normal position.

v The trunnion member 60'is secured tothe I upwardly extending tubularsleeve of the weight 60 and 1Q,-=and carries the rollers 50 and 51. Itis alsoprovided with rectangular portions that engage the'slots orguides 29 in the yoke. have shown the trunnion member separfthfrom the'neck of the weight to which it 'is attached for convenience inmanufacture. ,The eflect wouldbe the same if these parts were integral.Hence from one point of view on the weight. Looking at; it in anotherway, the weight forms the lower stop or.

support for the nut and when it is released the nut is permitted toslide downward.

carrying with it the valve spindle and the valve. S ecuredtojthe lowerextremity of by mea ns of screws 61, Figs. 7.

the sliding nut 27 is seated mthe' purpose of operating the valve.

.gwhich go and externally tribu'ted as to permit of big the valve. By

" valve in the open position, g -Lhand-WheeI 63 and spindle 15 arerotated in I, thereo socause the valfveto move downwardly, the

has the spindle 15 in any intermediate 3 stance to'the packin shoulder64 "which 6o member which acts as serves as an auxiliary valve motivefluid tocirculate inside the valve and the valve spindle 15 is ahandwheel' 63 for I10- cated on the spindle 15 between the hand wheel 63and nut 27 is a sleeve 65, Fig. 2. serves as a stop. for the downwardmovement of thenut- 27 under certain con- :ditions which will bereferred to later in describing theoperation of the valve. Weightis'guidedint'ernally by the spindle by the downwardly project- ]1ng'part of the yoke. The arrangement of the weight and ootiperating parts hasthe advantage of making a ver compact structure with the mass of theweight so disa relatively small external diameter. It will be noted thatthe "weight 60 whenin its suspended position acts as a support for thesliding nut 27 and siphon released as an agent for suddenly closreasonof this arrange- 1 :{nent I am able to utilize the weight for twoipurposes whereas-zit has been only utilized for-one heretofore.

'Referring'to Fig. 2 which illustrates the to close it the a clockwisedirection. 'The slightly unbalanced ressureon the valve and the weightand-that of its associated parts,

;nut 27 resting; on the trunnion member 60 and hence on the weight 60;This movement continues until the main valve 10 rests on its seat 7.Further, rotary movement of in the same direction causes the Hill? .27to move upwardly until it strikes a shoulder or stopfi l formed on theyoke 8. This stops the upward movement of the nut .and as the spindle 15continues to be rotated eelit pauses the spindle to move downwardlythrough the nut the valve to be seat. 4 If for any reason the valveshould stick position, due for inbeing too tight or dirt ..-eoll ectingon the va ve spindleor seat, the olockwise'rotation of the spindle lliwill oa-use'the nut to move upwardly against the stops its upward move-3, ntent and further rotation of the spindle in the nut causes the valve10 to be pulled by a slight amount, causing firmly pressed against itsdownward until it is closed. Assuming the valve is closed, to open it tothe handwheel 63 is rotated in the oppoaiter or anti-clockwise directionwhich first eauses the nut to move downwardly into the p0S1tlOn shown indotted lines, Fig. 8, a, until it comes in contact with the trunnion thelower stop. Further rotation oft'he spindle causes the said spindle tomove upwardly through the nut, thereby raising; thejoap 17. y This capand permits the The weight of the substantially balances it as to fluidpressures. The valve now being in a state of balance the operator canopen itwith ease by rotating the handivheela If the valve was notbalanced itwould necessitate an excessive amount of power to operate itas will readily be understood. l a

As the spindle 15 moves upwardly, it carries with it the sleeve 65 whichserves as a stop for the valve and spindle! To better understand thestopping feature; the nut will first be considered at re'stfAny pressureor weight against the nut is in the direction and is taken up by the adownward trunnion member 60. As the spindle is 1'0 tated the action ofthe thread in the nut 27 causes the spindle to move upwardly, the

nut and the trunnion member (50 which is held in position by the hooks41 and 42. As the sleeve 65 moves with the spindle, it is evident underthese conditions that its move ment will be upwarduntil it comes inconparts being taken .up by said tact with the nut 27 Which preventsfurther movement of the spindle and valve. This sleeve is of suchdimensions as to 'perinitthe valve to have a proper openiugjon the onehand and not to strike the casing on the other.

The operation of the valve under emergency conditions will/now beconsidered. Excessive speed causes the speed responsive device I) tomove outwardly due to centrifugal force, this nioveinent releasing thetrigger E and the latch F. controlled thereby and by means of the weight49, the hooks 41 and -12- are forced outwardly from under the rollers 51and 52, which allows the main weight 60 to drop and deliver a blow tothe hub of the handwheelrfil. This blow forces the wheel 63, spindle15,.nut 27 and valve 10 into the positionshown in Figs. 9 and 13,thereby closing the valve. The next operation, is to reset the valveactuating mechanism. The hand-wheel 63 is rotated in the valve-closingdirection which causes the nut 27 to travel upwardly until it strikesthe shoulder or stop 64, as shown. in Fig. '14-. Thus far the positionof the valve is not affected. The weight is then lifted by hand untilthe rollers 5lr and- 52 pass by the hooks 41 and 42 and Contact w th theprojections or arms 53 and 54. Further upward move- 'ment of the rollerscausosthe projections 53,

54: and levers 39, 40 to swing about the pivots 37, and the weight 4'!)to move upwardly, thereby bringing the hooks ll and 42 into the path ofthe rollers 50 and 51, when they are lowered, as shown in Fig. LC. Thismovement also forces the rod 3, leading to the governor, ,lfig. l,downwardly, thereby resetting thetrigger E and latch F and cooperatingparts. v The space or lost motion between the nut 27 and the trunnionmember 60, Fig. 15, is

for the purpose of allowing excess movement of the members in theresetting opera.-

tion, thereby insuring the proper latching i shoulder or stop 64 on oneside andthe trunnion member 60 on the other.

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention together with theapparatus which I now consider to' represent the best embodimentthereof; but I-desire to have it understood that the apparatus shown isonly illustrative, and that the-invention can be carried out by othermeans.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is

1. In combination, a valve, a casing there-. for, a spindle-and movablenut for opening and. closing the valve ;under normal conditions, aweight that acts as a'support for tlfe'"nut during normal operation ofthe valve and which actuates the valve when itis desired to move itsuddenly, and means .tjoi'holding the weight,

2."In; combination, a valve, a casing therefor, a spindle and slidingnut for opening and closing the valve under normal conditions asuspended-weight that acts as a.sup-

port for the nut during normal operation of the valve and which actuatesthe valve when it is desired to move it suddenly, and means forreleasing the weight and permitting it to fall and the nut to slide3.111 a valve of the character described, the combination of a valve, acasing therefor, a sliding nut, a valve actuating spindle cotiperatingwith the nut, a member upon which the nut normally rests, means whichsupport said member, and mechanism for releasing said means to cause thevalve to close suddenly.

4. Ina valve of the character described, the combination of a valve, acasing therefor,-a sliding nut, a valve operating spindle coiiperatingtherewith, a weight which when in its raised position forms a supportfor the nut, means for sustaining the weight, and means for releasingthe weight to per mit it to move the valve.

5. In a valve of the character described, the combination of a valve, acasing therefor, a yoke carried by the casin that forms a guide, a nutguided by the yo e, stops be tween which the nut moves with a limitedamountfof lost motion, means for moving one of the stopsto permit thenut to slide and close the valve, and a valve actuating spindle thatcoiiperates with the nut.

1 6. In a valve of the character described,-

the combination of a valve, a casing therefor, a split yoke carried bythe casing, a pivot that is supported by the yoke and forms a means forconnecting the parts thereof, a lever carried by the pivot, a weightthat is sustained in position by the lever, a nut supported by thelever, and a. valve actuating spindle that cotiperates wit the nut.

7. In a valve of the character described, the combination of a valve, acasing there-- for, a sliding nut, a valve actuating spindle thatcooperates with the nut, a weight having a tubular neck that surroundsthe spin die, means attached to the neck for 'suppo'rting the weight,said means also acting as a seat for the nut, a lever havin h 0'k's.-that engage said means, and race anislllzt which normally holds thesaidmeans but releases it under emergency conditionsi 8. In a valve ofthe character described, the combination of a valve, acasing there for,a sliding nut, a valve actuating'spindle that cooperates with the nut, aweight having a tubular neck that surrounds: the spindle, means attachedto the neck for sup porting the weight, said means also acting as a seatfor the nut, a lever having hooksthat engage said means, a yoke that isat-' tached to the casing and supports the lever, and a speed governorthat releases the lever and hooks under certain conditions.

9. In a valve of the character described, the combination of a valve, acasing therefor, a sliding nut, avail/e spindle co'ciperat-ing with thenut, stops between which the nut moves, a'yoke attached to the casingthat carries one of the stops, a means WhlClllCZlI- riesthe second stop,a device carried by the yoke which normally holds said means, and jmechanism' for releasing the secondstop and permitting the nut andspindle to slide in a direction to seat the valve. I 10. In a valve ofthe character described,

the combination of a valve, a casing there-' for, a Sliding nut, 'avalve spindle coiiperating with the nut, a split yoke carried by thecasing which has a tubular end, a

weight having a neck that surrounds the spindle and is guided internallyby the spindle and externally by the/tubular end of the yoke, said'neckforming a seat for the nut,

and means for sustaining the weight in its normal position and releasingit under emergency condltions.

11. In a valve of the character described,

for, a sliding nut, a valve spindle coiiperating with the nut, a splityoke carried by yoke, a lever and hooks supported by the pivot, aweight, a member attached tothe weight having trunnions that engage thehooks, said member also forming a seat for .the nut, and means whichnormally serve to .the combination of a valve, a casing there- With'thenut, a hand wheel hold the hooks in engagement With the trunnions andrelease them when it is desired to close the valve suddenly.

12. In a valve of the character described, the combination of a valve, acas'ingftherefor, a sliding nut which is normally confined but has acertain limited amount of axial movement, a valve spindle thatcooperates for opening and closing the valve by' hand, a suspendedweight which when released closes the valve suddenly,

the valve sud- Wheel therefor, a stop Which moves with the a means forrele spindle and engages the nut when the valve is fully open to preventfurther travel, and 'asing, the nut to permit the valve to closesuddenly.

14; In combination, a main valve, a cassaid Weight forming a seat for othe nut, and means for releasing the weight ing therefor, a spindle onwhich said valve is loosely mounted, a means that incloses one end ofthe spindle and acts to transmit axial motion of the spindle to thevalve and also acts as an auxiliary valve tobalance the pressures on themain valve, a sliding nut, a Weight upon which the nut rests, and meansfor releasing the Weight and permitting it to fall andthe nut to slide.

15. In a valve of the character described, the combination of a valve, acasing therefor, a spindle upon which the valve is loosely mounted, anauxiliary valve located at the end of the spindle which is arranged toengage the main valve under certain conditions and force it against itsseat, and a dash-pot to checkclosing movements of the main valve.

In Witness whereof, I have hereunto set my hand this-18th day ofJanuary, 1912,

- WERNER JOHNSON.

Witnesses:

JOHN A. MoMANUs, Jr., FRANK O. HATTIE.

